CN102075274B - The collocation method of the multiple antennas parameter of a kind of measuring reference signals and device - Google Patents

Abstract

The invention discloses multiple antennas method for parameter configuration and the device of a kind of measuring reference signals, for the problem solving to determine multiple antennas SRS parameter configuration in prior art.Base station of the present invention sends the parameter of SRS by high-level signaling notice UE, and according to the antenna port quantity and default mapping relations that send SRS, UE determines that each antenna port sends the parameter of SRS, the cyclic shift of each antenna port is spacedly distributed, and interval takes maximum；When the antenna port quantity sending SRS is 4, the frequency comb of antenna port 0 and antenna port 1 is all k_TC；Part circular shift informationCorresponding antenna port 2 and the frequency comb of antenna port 3 are k_TC, remaining circular shift informationCorresponding antenna port 2 and the frequency comb of antenna port 3 are 1 k_TC.Using technical scheme, according to the implicit mapping relations of configuration, terminal can determine that each antenna port sends the parameter of SRS, can save signaling consumption, can guarantee that again the motility of configuration.

Description

The collocation method of the multiple antennas parameter of a kind of measuring reference signals and device

Technical field

The present invention relates to the communications field, especially relate to a kind of measuring reference signals (Sounding Reference Signal, SRS) the collocation method of multiple antennas parameter and device.

Background technology

The uplink physical channel of Long Term Evolution (Long Term Evolution, LTE) system comprises physics Stochastic accessing letter Road (Physical Random Access Channel, PRACH), Physical Uplink Shared Channel (Physical Uplink Shared Channel, PUSCH), Physical Uplink Control Channel (Physical Uplink Control Channel, PUCCH).In LTE, Physical Downlink Control Channel (Physical Downlink Shared Channel, PDCCH) is used for holding Carry uplink and downlink schedule information, and uplink power control information.(e-Node-B, eNB) can pass through Downlink Control Information in base station Configurating terminal device (User Equipment, UE), or the configuration of terminal unit acceptance high-rise (higher layers), also It is referred to as configuring UE by high-level signaling.Downlink Control Information (Downlink Control Information, DCI) form (format) be divided into DCI format 0,1,1A, 1B, 1C, 1D, 2,2A, 3,3A etc..

SRS is for measuring radio channel information (Channel State between a kind of terminal unit and base station Information, CSI) signal.In long evolving system, bandwidth that UE indicates according to eNB, frequency domain position, sequence loops The parameters such as displacement, cycle and sub-frame offset, timing sends uplink SRS on last data symbol sending subframe.ENB root Judge the up CSI of UE according to the SRS received, and carry out the behaviour such as frequency domain selection scheduling, close-loop power control according to the CSI obtained Make.

In LTE system, the SRS sequence that UE sends is by Glycine tomentella sequenceIt is circulated displacement in time domain α obtains.Same root sequence is carried out different cyclic shifts α, it becomes possible to obtain different SRS sequences, and obtain Between these SRS sequences mutually orthogonal, therefore, it can to distribute to these SRS sequences different UE and use, to realize between UE CDMA.In LTE system, 8 cyclic shifts α of SRS sequence definition, be given by equation below (1):

$\mathrm{\α}=2\mathrm{\π}\frac{n_{\mathrm{SRS}}^{\mathrm{cs}}}{8}$ ... formula (1)

Wherein,Indicated by the signaling of 3bit, respectively 0,1,2,3,4,5,6 and 7.It is to say, with for the moment Frequently under resource, the UE in community has 8 available code resources, and it is same on identical running time-frequency resource that eNB at most can configure 8 UE Time send SRS.Formula (1) is considered as in time domain, SRS sequence is divided into 8 parts at equal intervals, but owing to SRS sequence length is 12 Multiple, so the minimum length of SRS sequence is 24.

In LTE system, the frequency domain bandwidth of SRS uses tree to configure.Each SRS band width configuration (SRS Bandwidth configuration) a corresponding tree structure, the SRS bandwidth (SRS-of top (or referred to as ground floor) Bandwidth) to should the maximum SRS bandwidth of SRS band width configuration, or referred to as SRS bandwidth range.UE refers to according to the signaling of base station Show, after being calculated the SRS bandwidth of self, the top signaling frequency domain position n sent further according to eNB_RRCDetermine that self sends The frequency domain initial position of SRS.Fig. 1 is distribution difference n of prior art_RRCUE send SRS frequency domain initial position schematic diagram, As it is shown in figure 1, be assigned with different n_RRCUE by community SRS bandwidth zones of different send SRS, wherein, UE1 is according to n_RRC= 0 determines the frequency initial position sending SRS, and UE2 is according to n_RRC=3 determine the frequency initial position sending SRS, and UE3 is according to n_RRC =4 determine the frequency initial position sending SRS, and UE4 is according to n_RRC=6 determine the frequency initial position sending SRS.

The sequence that SRS is used is selected from demodulation pilot frequency sequence group, when the SRS of UE carries a width of 4 Resource Block Time (Resource Block, RB), the computer of a length of 2 RB is used to generate the sequence of (Computer Generated, CG)； When the SRS band of UE is wider than 4 RB, use the Zadoff-Chu sequence of corresponding length.

It addition, in same SRS bandwidth, the subcarrier (sub-carrier) of SRS is spaced apart, say, that The transmission of SRS uses pectinate texture, and the quantity of the frequency comb (frequency comb) in LTE system is 2, also corresponds to time domain Repeat factor value (RePetition Factor, RPF) be 2.Fig. 2 is the pectinate texture schematic diagram of the SRS of prior art, as Shown in Fig. 2, when each UE sends SRS, only use in two frequency comb, comb=0 or comb=1.So, UE according to The frequency comb comb position instruction of the top signaling of 1 bit, the subcarrier only using frequency domain index to be even number or odd number sends SRS.This pectinate texture allows more UE to send SRS in same SRS bandwidth.

In same SRS bandwidth, multiple UE can use different cyclic shifts in same frequency comb, then passes through Code division multiplexing sends SRS, it is also possible to two UE, in different frequency comb, send SRS by frequency division multiplexing.For example, exist In LTE system, in certain SRS bandwidth (4 RB) send SRS UE, it is possible to use cyclic shift have 8, it is possible to use Frequency comb be 2, a total of 16 resources that can be used to send SRS of UE thus, say, that in this SRS bandwidth, At most can send 16 SRS simultaneously.Owing to not supporting uplink single user multiple-input and multiple-output (Single in LTE system User Multiple Input Multiple Output, SU-MI MO), UE can only have an antenna to send in each moment SRS, so a UE has only to a SRS resource, therefore, in above-mentioned SRS bandwidth, system at most can be with concurrent multiplexing 16 UE。

Senior LTE (LTE-Advanced, LTE-A) system is the evolution system of future generation of LTE system, in up support SU-MIMO, and 4 antennas at most can be used as up transmitting antenna.It is to say, UE can be many at synchronization Send SRS on root antenna simultaneously, and eNB needs to estimate the state on every channel according to the SRS received on every antenna.

The research of existing LTE-A proposes: send SRS except retaining LTE original cycle (periodic), in order to Improve the utilization rate of SRS resource, improve the motility of scheduling of resource, it is also possible to joined by Downlink Control Information or high-level signaling Put UE aperiodic (aperiodic) and send SRS.Therefore SRS has the triggering type (trigger type) of two kinds, believes based on high level The triggering type 0 of order is cycle SRS, and Class1 based on DCI format is SRS aperiodic.When configuration UE multiple antennas sends SRS Time, how to determine the SRS parameter of every antenna, signaling consumption can be saved, can guarantee that again the motility of configuration, be one and wait to solve Problem certainly.

Summary of the invention

In view of this, present invention is primarily targeted at the multiple antennas method for parameter configuration of a kind of measuring reference signals is provided And device, for the problem solving to determine multiple antennas SRS parameter configuration in prior art.

For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:

A kind of multiple antennas method for parameter configuration of measuring reference signals (SRS),

Base station sends the parameter of SRS by high-level signaling notice user terminal (UE), and described SRS is cycle SRS or non-week Phase SRS, the parameter of described transmission SRS comprises cyclic shiftWith frequency comb k_TC；

After the parameter of the transmission SRS that UE obtains base station notice, according to sending the antenna port quantity of SRS and default mapping Relation determines that each antenna port sends the parameter of SRS.

Further, when sending the quantity of antenna port of SRS more than 1, described default mapping relations comprise:

The cyclic shift that each antenna port sends in the parameter of SRS is spacedly distributed, and described interval is equal to 8 divided by transmission The antenna port quantity of SRS.

Further, when the antenna port quantity sending SRS is 4, described default mapping relations comprise:

The frequency comb of antenna port 0 and antenna port 1 is all k_TC；

Part circular shift informationCorresponding antenna port 2 and the frequency comb of antenna port 3 are k_TC, remaining circulation Shift informationCorresponding antenna port 2 and the frequency comb of antenna port 3 are 1-k_TC。

Further, when send SRS antenna port quantity be 1 time, described default mapping relations particularly as follows:

The cyclic shift of antenna port 0Frequency comb

Further, when send SRS antenna port quantity be 2 time, described default mapping relations particularly as follows:

The cyclic shift of antenna port 0Frequency comb

The cyclic shift of antenna port 1Frequency comb

Based on the specific embodiment of the invention, when the antenna port quantity sending SRS is 4, described default mapping relations Particularly as follows:

The cyclic shift of antenna port 0The frequency comb of antenna port 0

The cyclic shift of antenna port 1Antenna port 1 frequency comb

The cyclic shift of antenna port 2Antenna port 2 frequency comb is true by lower relation of plane Fixed:

WhenWhen being certain integer of 0 to 3, antenna port 2 frequency comb

WhenWhen being certain integer of 4 to 7, antenna port 2 frequency comb

Or,

WhenWhen being certain integer of 0 to 3, antenna port 2 frequency comb

WhenWhen being certain integer of 4 to 7, antenna port 2 frequency comb

Or,

WhenDuring for even number, antenna port 2 frequency comb

WhenDuring for odd number, antenna port 2 frequency comb

Or,

WhenDuring for even number, antenna port 2 frequency comb

WhenDuring for odd number, antenna port 2 frequency comb

The cyclic shift of antenna port 3Antenna port 3 frequency comb is with reference to the frequency of antenna port 2 The determination mode of rate comb determines.

Based on the specific embodiment of the invention, when the antenna port quantity sending SRS is 4, described default mapping relations Particularly as follows:

The cyclic shift of antenna port 0The frequency comb of antenna port 0

The cyclic shift of antenna port 2Antenna port 2 frequency comb

The cyclic shift of antenna port 1Antenna port 1 frequency comb is true by lower relation of plane Fixed:

WhenWhen being certain integer of 0 to 3, antenna port 1 frequency comb

WhenWhen being certain integer of 4 to 7, antenna port 1 frequency comb

Or,

WhenWhen being certain integer of 0 to 3, antenna port 1 frequency comb

WhenWhen being certain integer of 4 to 7, antenna port 1 frequency comb

Or,

WhenDuring for even number, antenna port 1 frequency comb

WhenDuring for odd number, antenna port 1 frequency comb

Or,

WhenDuring for even number, antenna port 1 frequency comb

WhenDuring for odd number, antenna port 1 frequency comb

The cyclic shift of antenna port 3Antenna port 3 frequency comb is with reference to the frequency of antenna port 1 The determination mode of rate comb determines.

Based on said method embodiment, the present invention also proposes the determination dress of the multiple antennas parameter of a kind of measuring reference signals Putting, this device includes:

Receiver module, for receiving the parameter of the transmission SRS that base station is issued by high-level signaling, described SRS is cycle SRS Or SRS aperiodic, the parameter of described transmission SRS comprises cyclic shiftWith frequency comb k_TC；

Determine module, the parameter of the transmission SRS for issuing based on base station, the antenna port quantity of SRS is sent according to UE And the mapping relations preset determine that each antenna port sends the parameter of SRS.

When the antenna port quantity sending SRS is 1, the described SRS parameter determination determining that base station is issued by module is sky The SRS parameter of line cap 0；

When sending the quantity of antenna port of SRS more than 1, described determine that module is determined as follows each antenna end The parameter of mouth transmission SRS:

The cyclic shift that each antenna port sends in the parameter of SRS is spacedly distributed, and described interval is equal to 8 divided by transmission The antenna port quantity of SRS.

When the antenna port quantity sending SRS is 4, described determine that module is determined as follows each antenna port and sends out Send the parameter of SRS: the frequency comb of antenna port 0 and antenna port 1 is all k_TC；

Part circular shift informationCorresponding antenna port 2 and the frequency comb of antenna port 3 are k_TC, remaining circulation Shift informationCorresponding antenna port 2 and the frequency comb of antenna port 3 are 1-k_TC。

Use technical scheme, according to the implicit mapping relations of configuration, terminal can determine that each antenna port sends The parameter of SRS, can save signaling consumption, can guarantee that again the motility of configuration.

Accompanying drawing explanation

Fig. 1 is distribution difference n of prior art_RRCUE send SRS frequency domain initial position schematic diagram；

Fig. 2 is the pectinate texture schematic diagram of the SRS of prior art；

Fig. 3 is the flow chart of the multiple antennas method for parameter configuration of measuring reference signals of the present invention.

Detailed description of the invention

For making the object, technical solutions and advantages of the present invention clearer, by the following examples and referring to the drawings, right The present invention further describes.

The flow chart of the multiple antennas method for parameter configuration of the measuring reference signals that Fig. 3 provides for the present invention, the method includes:

Step 301, base station send the parameter of SRS, the parameter of described transmission SRS by high-level signaling notice user terminal UE Comprise cyclic shiftWith frequency comb k_TC(or referred to as transmissionComb)；

Described SRS includes cycle SRS, SRS aperiodic.

After the parameter of the transmissions SRS that step 302, UE obtain base station notice, according to the antenna port quantity and in advance sending SRS If mapping relations determine each antenna port send SRS parameter.

Preferably, the cyclic shift between each antenna port is spacedly distributed, and margin maximization, i.e. interval is removed equal to 8 To send the antenna port quantity of SRS；When the antenna port quantity of SRS is 1 or 2, the frequency comb of each antenna port is all k_TC； When the antenna port quantity of SRS is 4, the frequency comb of antenna port 0 and antenna port 1 is all k_TC, part circular shift informationCorresponding antenna port 2 and the frequency comb of antenna port 3 are k_TC, remaining circular shift informationCorresponding antenna port 2 It is 1-k with the frequency comb of antenna port 3_TC。

The following examples are that the form using form is to represent the cyclic shift of each antenna port and the implicit of frequency comb Map.Wherein, the N in form_pRepresent the antenna port quantity sending SRS.

Embodiment of the method

In this embodiment, base station sends the parameter of SRS by high-level signaling notice UE, and the parameter of described transmission SRS comprises Cyclic shiftWith frequency comb k_TC；After the parameter of the transmission SRS that UE obtains base station notice, according to the antenna port number sending SRS Amount and the mapping relations preset determine that each antenna port sends the parameter of SRS, and concrete mapping relations are based respectively on table 1 to table 10, can there be 10 kinds of mapping modes.

Mode 1:

The cyclic shift of each antenna port of table 1 and the implicit mapping table 1 of frequency comb

Mode 2:

The cyclic shift of each antenna port of table 2 and the implicit mapping table 2 of frequency comb

Mode 3:

The cyclic shift of each antenna port of table 3 and the implicit mapping table 3 of frequency comb

Mode 4:

The cyclic shift of each antenna port of table 4 and the implicit mapping table 4 of frequency comb

Mode 5:

The cyclic shift of each antenna port of table 5 and the implicit mapping table 5 of frequency comb

Mode 6:

The cyclic shift of each antenna port of table 6 and the implicit mapping table 6 of frequency comb

Mode 7:

The cyclic shift of each antenna port of table 7 and the implicit mapping table 7 of frequency comb

Mode 8:

The cyclic shift of each antenna port of table 8 and the implicit mapping table 8 of frequency comb

Mode 9:

The cyclic shift of each antenna port of table 9 and the implicit mapping table 9 of frequency comb

Mode 10:

The cyclic shift of each antenna port of table 10 and the implicit mapping table 10 of frequency comb

Wherein, N_pFor sending the antenna port quantity of SRS,For antenna end slogan,And k_TCIt is respectively base station to be sent to Cyclic shift in the parameter of the transmission SRS of UE and the value of frequency comb.

Based on table 1 to table 9, when the antenna port quantity sending SRS is 4, UE determines the antenna port of each transmission SRS The method of SRS parameter particularly as follows:

(1) when the antenna port quantity sending SRS is 1:

The cyclic shift of antenna port 0Frequency comb

(2) when the antenna port quantity sending SRS is 2:

The cyclic shift of antenna port 0Frequency comb

The cyclic shift of antenna port 1Frequency comb

(3) when the antenna port quantity sending SRS is 4:

The cyclic shift of antenna port 0Frequency comb

The cyclic shift of antenna port 1Frequency comb

Antenna port 2 cyclic shiftThe frequency comb of antenna port 2 is true by lower relation of plane Fixed:

● whenWhen being certain integer of 0 to 3, $k_{\mathrm{TC}}^2=k_{\mathrm{TC}};$

● whenWhen being certain integer of 4 to 7, $k_{\mathrm{TC}}^2=1-k_{\mathrm{TC}};$

Or,

● whenWhen being certain integer of 0 to 3, $k_{\mathrm{TC}}^2=1-k_{\mathrm{TC}};$

● whenWhen being certain integer of 4 to 7, $k_{\mathrm{TC}}^2=k_{\mathrm{TC}};$

Or,

WhenDuring for even number, $k_{\mathrm{TC}}^2=k_{\mathrm{TC}};$

WhenDuring for odd number, $k_{\mathrm{TC}}^2=1-k_{\mathrm{TC}};$

Or,

WhenDuring for even number, $k_{\mathrm{TC}}^2=1-k_{\mathrm{TC}};$

WhenDuring for odd number, $k_{\mathrm{TC}}^2=k_{\mathrm{TC}}.$

The cyclic shift of antenna port 3The determination mode of the frequency comb of antenna port 3 is on the same day Line cap 2.

Based on table 10, in another preferred embodiment of the present invention, when the antenna port quantity sending SRS is 4, UE can use Following method determines the SRS parameter of the antenna port of each transmission SRS:

The cyclic shift of antenna port 0The frequency comb of antenna port 0

The cyclic shift of antenna port 2Antenna port 2 frequency comb

The cyclic shift of antenna port 1Antenna port 1 frequency comb is true by lower relation of plane Fixed:

WhenWhen being certain integer of 0 to 3, antenna port 1 frequency comb

WhenWhen being certain integer of 4 to 7, antenna port 1 frequency comb

Or,

WhenWhen being certain integer of 0 to 3, antenna port 1 frequency comb

WhenWhen being certain integer of 4 to 7, antenna port 1 frequency comb

Or,

WhenDuring for even number, antenna port 1 frequency comb

WhenDuring for odd number, antenna port 1 frequency comb

Or,

WhenDuring for even number, antenna port 1 frequency comb

WhenDuring for odd number, antenna port 1 frequency comb

The cyclic shift of antenna port 3The determination mode of the frequency comb of antenna port 3 is on the same day Line cap 1.

Present invention mapping mode based on table 1-table 10, can obtain the cyclic shift of each portWith frequency comb k_TCBetween Implicit mapping relations, i.e. just may know that the cyclic shift of the SRS of UE all of the port by the signaling of an instruction cyclic shift With frequency comb k_TCValue.Thus saved unnecessary signaling consumption.Also reduce the complexity that UE realizes.

The mapping mode that wherein table 10 is taked can also obtain the resource of the resource reuse 4 port UE of 2 port UE, and i.e. one The SRS resource that the UE of individual 4 ports uses constitutes the resource of two 2 port UE.Thus reach the flexible tune of different number of ports UE Degree.

Device embodiment

Based on said method embodiment, the present invention proposes the determination dress of the multiple antennas parameter of a kind of measuring reference signals Putting, this device is positioned at UE, including:

Receiver module, for receiving the parameter of the transmission SRS that base station is issued, the ginseng of described transmission SRS by high-level signaling Number comprises cyclic shiftWith frequency comb k_TC；

Determine module, the parameter of the transmission SRS for issuing based on base station, the antenna port quantity of SRS is sent according to UE And the mapping relations preset determine that each antenna port sends the parameter of SRS, it is real that concrete mapping relations are based respectively on said method Execute table 1 to the table 10 in example, can have 10 kinds of mapping modes.

Owing to apparatus of the present invention embodiment is that therefore each module in device embodiment is all based on said method embodiment Set for each steps flow chart of realizing in said method embodiment, for saving space, the content identical with said method embodiment Here is omitted.

Obviously, those skilled in the art should be understood that each module of the above-mentioned present invention or each step can be with general Calculating device realize, they can concentrate on single calculating device, or be distributed in multiple calculating device and formed Network on, alternatively, they can with calculate the executable program code of device realize, it is thus possible to by they store Performed by calculating device in the storage device, and in some cases, can perform with the order being different from herein shown The step gone out or describe, or they are fabricated to respectively each integrated circuit modules, or by the multiple modules in them or Step is fabricated to single integrated circuit module and realizes.So, the present invention is not restricted to the combination of any specific hardware and software.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made any repaiies Change, equivalent, improvement etc., should be included within the scope of the present invention.

Claims (6)

1. the multiple antennas method for parameter configuration of a measuring reference signals (SRS), it is characterised in that

Base station sends the parameter of SRS by high-level signaling notice user terminal (UE), and the parameter of described transmission SRS comprises circulation and moves PositionWith frequency comb k_TC；

After the parameter of the transmission SRS that UE obtains base station notice, according to sending the antenna port quantity of SRS and default mapping relations Determine that each antenna port sends the parameter of SRS, wherein, when the antenna port quantity sending SRS is 4, described default mapping Relation comprises: the frequency comb of antenna port 0 and antenna port 1 is all k_TC；Part circular shift informationCorresponding antenna end The frequency comb of mouth 2 and antenna port 3 is k_TC, remaining circular shift informationCorresponding antenna port 2 and antenna port 3 Frequency comb is 1-k_TC。

Method the most according to claim 1, it is characterised in that when sending the quantity of antenna port of SRS more than 1, institute State default mapping relations to comprise:

The cyclic shift that each antenna port sends in the parameter of SRS is spacedly distributed, and described interval is equal to 8 divided by sending SRS Antenna port quantity.

Method the most according to claim 1 and 2, it is characterised in that when the antenna port quantity sending SRS is 4, described Preset mapping relations particularly as follows:

The cyclic shift of antenna port 0The frequency comb of antenna port 0

The cyclic shift of antenna port 1Antenna port 1 frequency comb

The cyclic shift of antenna port 2Antenna port 2 frequency comb is determined by lower relation of plane:

WhenWhen being certain integer of 0 to 3, antenna port 2 frequency comb

WhenWhen being certain integer of 4 to 7, antenna port 2 frequency comb

Or,

WhenWhen being certain integer of 0 to 3, antenna port 2 frequency comb

WhenWhen being certain integer of 4 to 7, antenna port 2 frequency comb

Or,

WhenDuring for even number, antenna port 2 frequency comb

WhenDuring for odd number, antenna port 2 frequency comb

Or,

WhenDuring for even number, antenna port 2 frequency comb

WhenDuring for odd number, antenna port 2 frequency comb

The cyclic shift of antenna port 3Antenna port 3 frequency comb is with reference to the frequency comb of antenna port 2 Determination mode determine.

Method the most according to claim 1, it is characterised in that described SRS is cycle SRS or SRS aperiodic.

5. the determination device of the multiple antennas parameter of a measuring reference signals, it is characterised in that this device includes:

Receiver module, for receiving the parameter of the transmission SRS that base station is issued, the parameter bag of described transmission SRS by high-level signaling Containing cyclic shiftWith frequency comb k_TC；

Determine module, for the parameter of transmissions SRS issued based on base station, send the antenna port quantity and in advance of SRS according to UE If mapping relations determine each antenna port send SRS parameter, wherein, when send SRS antenna port quantity be 4 time, institute State determine module be determined as follows each antenna port send SRS parameter: antenna port 0 and the frequency of antenna port 1 Comb is all k_TC；Part circular shift informationCorresponding antenna port 2 and the frequency comb of antenna port 3 are k_TC, remaining follows Ring shift informationCorresponding antenna port 2 and the frequency comb of antenna port 3 are 1-k_TC。

Device the most according to claim 5, it is characterised in that

When sending the quantity of antenna port of SRS more than 1, described determine that module is determined as follows each antenna port and sends out Send the parameter of SRS:

The cyclic shift that each antenna port sends in the parameter of SRS is spacedly distributed, and described interval is equal to 8 divided by sending SRS Antenna port quantity.